Parallel bars



2 Sheets Sheet 1.

(No Model.)

T. PETERSON. PARALLEL BARS.

Patented Aug. 23, 1892.

a r v No.48L509.

2 SheetsSheet 2.

MW WELLQQLQETELQSQJJ W (No Model.)

T. PETERSON.

PARALLEL BARS.

Patented Aug. 23, 1892.

UNITED STATES PATENT OFFICE.

THEODORE PETERSON, OF AKRON, OHIO.

PARALLEL BARS.

SPECIFICATION forming part of Letters Patent No. 481,509, dated August23, 1892.

Application filed October 22, 1890. Serial No. 368,894. (No model.)

To all whom it may concern:

Be it known that I, THEODORE PETERSON, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented a certain new and useful Improvement in Devices for OonnnectingParts of Exercising Apparatus, of which the following is aspecification.

My invention relates to improvements in devices for uniting parts ofexercising apparatus, and is especially designed to unite horizont-alparallel bars with their supports, but may be used in uniting otherparts.

The objects of my invention are to provide a more secure means ofconnecting adjacent parts than that heretofore employed for thatpurpose; to provide for taking up the slack of the parts incident towear, and to conceal the connecting device within the wood parts, sothat there will be no projecting parts to injure the user.

To the aforesaid purpose my invention consists of the devices,construction, and combination of parts illustrated in the accompanyingdrawings, as hereinafter described, and then specifically pointed out inthe claims.

In the accompanying drawings, in which similar letters of referenceindicate like parts, Figure 1 is a central vertical longitudinal sectionof a part of a parallel bar and a support, showing my improvement; Fig.2, a side elevation of a part of the same; Fig. 3, a vertical transversesection of Fig. 2 through the center of the attaching bolt; Figs. at and5, elevations of the retaining-bolt and key; Fig. 6, a view of theinvention applied to low parallel bars, the right half from the brokenline in central vertical longitudinal section and the left half inelevation; and Fig. 7, a perspective view of the parallel bars andsupports, the near bar being partly shown in vertical longitudinalsection.

Referring to the construction shown in Figs. 1, 2, and 3, A represents aportion of one of the parallel bars; B, a part of one of thesupporting-posts, upon the upper end of which rests a clip or rest 0,connected therewith by a bolt D.

In the lower face of the bar A are bored holes, which do not extend tothe top of the bar A,of exact size to receive retaining-bolts E E, andtransversely through these holes are smaller holes to accurately fit thekeys F. The bolts E are of the form shown, being straight round rodsscrew-threaded at one end and provided with a nut and having atransverse hole near the other end of proper size to receive andaccurately fit a key F.

In operation the bolt E is forced into the hole in the lower face of thebar A until the hole in its upper end registers with the transverse holein the bar, through which holes the key F is passed, thereby securelyretaining the bolt. The bolt is then passed through the clip 0 and thenut screwed on and turned tight, thereby making a rigid connection andwhich can always be maintained in case of wear by tightening the nut.The ends of the key F are filed oif and polished even with the faces ofthe bar A, and thus present no projections or roughness for the hand.

In construction it may be and often is found preferable to bore theorifice for the key from one side nearly through the bar A, and

' by shortening the key enable it to be entirely inclosed within the barand permit the orifice to be closed with sawdust and glue or othersuitable composition, so that the ends of the key F will beentirelyhidden from sight or touch.

The application of the fastener to uniting 10 parallel bars and supportsis illustrated in Fig. 6, in which the parts are identical with oranalogous to the parts just described, are indicated by the samereference-letters bearing prime-marks, and in which A is the bar, B thesupporting-block, E the bolt, and F the key, the construction andarrangement of which will be readily understood from the drawings andthe foregoing description.

The only difference between the construction just described and theentire machine shown in Fig. 7 is that in the support shown in sectionin that figure the clip is found on top of and integral with thesupport.

Having thus described my invention, what I claim is- 1. The parallelbars and supports, combined with vertical bolts to unite said supportsand bars and horizontal keys to retain said bolts in the bars,substantially as shown and described.

2. The combination, with the parallel bars and the supports providedwith clips, of ver- 5 tical bolts arranged to pass through said clipsand into said bars and keys arranged to pass through said bars andbolts, substantially as shown and described.

In testimony that I claim the above I hereunto set my hand.

THEODORE PETERSON.

In presence of- (J. P. HUMPHREY, G. E. HUMPHREY.

